TOYOTA SIENNA HYBRID 2023 Owners Manual

3495-1. Using the air conditioning system and defogger
5
Interior features
The air conditioning system
switches between individual and
synchronous modes each time the
“SYNC” switch is operated.
(  P.355)
■Setting the fan speed
Operate the fan speed control
switch upwards to increase the
fan speed and downwards to
decrease the fan speed.
Pressing the “OFF” switch turns off
the fan.
■Change the airflow mode
Operate the airflow mode con-
trol switch.
The airflow mode changes as fol-
lows each time the switch is oper-
ated.
1 Upper body
2 Upper body and feet
3 Feet
4 Feet and the windshield
defogger operates
■Switching between outside
air and recirculated air
modes
Press the outside/recirculated
air mode switch.
The mode switches between out-
side air mode and recirculated air
mode each time the switch is oper-
ated.
When recirculated air mode is
selected, the indicator illuminates
on the outside/recirculated air
mode switch.
■Set cooling and dehumidifi-
cation function
Press the “A/C” switch.
When the function is on, the “A/C
ON” display on the front air condi-
tioning operation panel appears.
■Defogging the windshield
Defoggers are used to defog the
windshield and front side win-
dows.
Press the windshield defogger
switch.
Set the outside/recirculated air
mode switch to outside air mode if
the recirculated air mode is used. (It
may switch automatically.)
To defog the windshield and the
side windows quickly, turn the air
flow and temperature up.
To return to the previous mode,
press the windshield defogger
switch again when the windshield is
defogged.
When the windshield defogger
switch is on, the indicator illumi-
nates on the windshield defogger

3505-1. Using the air conditioning system and defogger
switch.
■Defogging the rear window
and outside rear view mir-
rors (if equipped), and de-
icing windshield wipers (if
equipped)
Defoggers are used to defog the
rear window and to remove rain-
drops, dew and frost from the
outside rear view mirrors (if
equipped).
The windshield wiper de-icer is
used to prevent ice from building
up on the windshield and wiper
blades.
Press the rear window defog-
ger/outside rear view mirror
defoggers /windshield wiper de-
icer switch.
The defoggers and windshield
wiper de-icer will automatically turn
off after 15 minutes.
When the rear window defog-
ger/outside rear v iew mirror defog-
gers /windshield wiper de-icer
switch is on, the indicator illumi-
nates on the switch.
■Eco air conditioning mode
The air conditioning is controlled
with low fuel consumption priori-
tized such as reducing fan
speed, etc.
Select the eco air conditioning
mode switch on the control
screen. ( P.352)
When the eco air conditioning
mode is on, the indicator illumi-
nates on the eco air conditioning mode switch.
■Fogging up of the windows
●The windows will
easily fog up
when the humidity in the vehicle is
high. Turning “A/C” switch on will
dehumidify the air from the outlets
and defog the windshield effec-
tively.
●If you turn “A/C” switch off, the
windows may fog up more easily.
●The windows may fog up if the
recirculated air mode is used.
■When driving on dusty roads
Close all windows. If dust thrown up
by the vehicle is still drawn into the
vehicle after closing the windows, it
is recommended that the air intake
mode be set to outside air mode
and the fan speed to any setting
except off.
■Outside/recirculated air mode
●Setting to the recirculated air
mode temporarily is recom-
mended in preventing dirty air
from entering the vehicle interior
and helping to c ool the vehicle
when the outside air temperature
is high.
●Outside/recirculated air mode may
automatically switch depending on
the temperature setting or the
inside temperature.
■When the outside temperature
exceeds 75°F (24°C) and the air
conditioning system is on
●In order to reduce the air condi-
tioning power consumption, the air
conditioning system may switch to
recirculated air mode automati-
cally. This may also reduce fuel
consumption.
●Recirculated air mode is selected
as a default mode when the power
switch is turned to ON.
●It is possible to switch to outside
air mode at any time by pressing
the outside/recirculated air mode

3515-1. Using the air conditioning system and defogger
5
Interior features
switch.
■Operation of the air condition-
ing system in Eco drive mode
●In Eco drive mode, the air condi-
tioning system is controlled as fol-
lows to prioritize fuel efficiency:
• Engine speed and compressor operation controlled to restrict
heating/cooling capacity
• Fan speed restr icted when auto-
matic mode is selected
●To improve air conditioning perfor-
mance, perform the following
operations:
• Adjust the fan speed
• Turn off Eco drive mode ( P.334)
• Turn off Eco air conditioning mode
●When the driving mode is set to
Eco driving mode, the Eco air con-
ditioning mode will be turned on
automatically. Even in this case,
the Eco air conditioning mode can
be turned off by pressing the Eco
air conditioning mode switch.
■When the outside temperature
falls to nearly 32°F (0°C)
The dehumidification function may
not operate even when “A/C” switch
is pressed.
■Ventilation and air conditioning
odors
●To let fresh air in, set the air condi-
tioning system to the outside air
mode.
●During use, various odors from
inside and outside the vehicle may
enter into and a ccumulate in the
air conditioning system. This may
then cause odor to be emitted
from the vents.
●To reduce potential odors from
occurring:
• It is recommended that the air conditioning system be set to out-
side air mode prior to turning the
vehicle off.
• The start timing of the blower may
be delayed for a short period of
time immediately after the air con-
ditioning system is started in auto- matic mode.
●When parking, the system auto-
matically switches to outside air
mode to encourage better air cir-
culation throughout the vehicle,
helping to reduce odors that occur
when starting the vehicle.
■Air conditioning filter
 P.438
■Air conditioning system refrig-
erant
●A label regarding the refrigerant of
the air conditioning system is
attached to the h ood at the loca-
tion shown in the following illustra-
tion.
●The meaning of each symbol on
the label are as follows:
■Customization
Some functions can be customized.
Caution
Air conditioning sys-
tem
Air conditioning sys-
tem lubricant type
Requires registered
technician to service
air conditioning sys-
tem
Flammable refrigerant

3525-1. Using the air conditioning system and defogger
(Customizable features: P.549)
■Main control screen
Adjust the left side seat tem-
perature setting
Adjust the fan speed setting
Select the air flow mode
: Air flows to the upper body
: Air flows to the upper body and
feet
: Air flows to the feet
: Air flows to the feet and the
windshield defogger operates
Adjust the right side seat
temperature setting
Display the option control
screen. ( P.353)
“AUTO” switch (automatic
mode)
Set automatic mode on/off
(  P.353)
“OFF” switch
Turn the fan off
Set cooling and dehumidifi-
cation function
If “A/C” switch is not pressed, the
WARNING
■To prevent the windshield
from fogging up
Do not use the windshield defog-
ger switch during cool air opera-
tion in extremely humid weather.
The difference between the tem-
perature of the outside air and
that of the windshield can cause
the outer surface of the wind-
shield to fog up, blocking your
vision.
■To prevent burns
●Vehicles with outside rear view
mirror defoggers: Do not touch
the outside rear view mirror sur-
faces, as they can become very
hot and burn you.
●Vehicles with windshield wiper
deicer: Do not touch the glass at
lower part of the windshield or
to the side of the front pillars
when the windshield wiper de-
icer is on.
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the air conditioning
system on longer than necessary
when the hybrid system is off.
■When repairing/replacing
parts of the air conditioning
system
Have repair/replacement per-
formed by your Toyota dealer.
When a part of th e air condition-
ing system, such as the evapora-
tor, is to be replaced, it must be
replaced with a new one.
Front air conditioning
control screen
A
B
C
D
E
F
G
H

3535-1. Using the air conditioning system and defogger
5
Interior features
system will blow ambient tempera-
ture air or heated air.
“SYNC” switch ( P.355)
Vehicles with “3-ZONE” mode: If
the indicator on the “SYNC” switch
is off, the temperature for the driver,
front passenger and rear seats can
be adjusted separately.
Vehicles with “4-ZONE” mode: The
temperature for the driver, front
passenger, left-hand side rear
seats and right-hand side rear
seats can be adjusted separately.
Set eco air conditioning
mode
The air conditioning is controlled
with low fuel consumption priori-
tized such as reducing fan speed,
etc.
■Option control screen
Select “Options” to display the
option control screen.
The functions can be switched on
and off.
When the function i s on, the indica-
tor illuminates on the screen.
“SYNC” switch ( P.355)
Vehicles with “3-ZONE” mode: If
the indicator on the “SYNC” switch
is off, the temperature for the driver,
passenger and rear seats can be adjusted separately.
Vehicles with “4-ZONE” mode: The
temperature for the driver, front
passenger, left-hand side rear
seats and right-hand side rear
seats can be adjusted separately.
Set cooling and dehumidifi-
cation function
If “A/C” switch is not pressed, the
system will blow ambient tempera-
ture air or heated air.
Set eco air conditioning
mode
The air conditioning is controlled
with low fuel con
sumption priori-
tized such as reducing fan speed,
etc.
1 Press the “AUTO” switch on
the air conditioning operation
panel or select the “AUTO”
switch on the control screen.
The dehumidification function
begins to operate. Air outlets and
fan speed are automatically
adjusted according to the tempera-
ture setting and humidity.
2 Adjust the temperature set-
ting.
3 To stop the operation, press
the “OFF” switch on the air
conditioning operation panel
or select the “OFF” switch on
the control screen.
If the fan speed setting or air
flow modes are operated, the
automatic mode indicator goes
off. However, automatic mode
I
J
A
Using automatic mode
B
C

3545-1. Using the air conditioning system and defogger
for functions other than that
operated is maintained.
■Using automatic mode
Fan speed is adjusted automati-
cally according to the temperature
setting and the ambient conditions.
Therefore, the fan may stop for a
while until warm or cool air is ready
to flow immediately after the auto-
matic mode switch is pressed.
This function automatically con-
trols the air conditioning airflow
so that priority is given to the
front seats. Unnecessary air
conditioning is suppressed, con-
tributing to increased fuel effi-
ciency.
Front seat concentrated airflow
mode operates in the following
situations.
 No passengers are detected
in the rear seats
 The windshield defogger is
not operating
While operating, illumi-
nates.
■Manually turning front seat
concentrated airflow mode
on/off
In front seat concentrated air-
flow mode, directing airflow to
the front seats only and to all
seats can be switched via switch
operation. When the mode has been switched manually, auto-
matic airflow control stops oper-
ating.
Press on the air condition-
ing operation panel and switch
the airflow.

Indicator illuminated: Airflow
to the front seats only
 Indicator off: Airflow to all the
seats
■Operation of automatic airflow
control
●In order to maintain a comfortable
interior, airflow may be directed to
seats without passengers immedi-
ately after the hybrid system is
started and at other times depend-
ing on the outside temperature.
●After the hybrid system is started,
if passengers move around inside
or enter/exit the vehicle, the sys-
tem cannot accura tely detect the
presence of passengers and auto-
matic airflow co ntrol will not oper-
ate.
■Operation of manual airflow
control
Even if the funct ion is manually
switched to directing airflow to only
the front seats, w hen a rear seat is
occupied, it may automatically direct
airflow to all seats.
■To return to automatic airflow
control
1 With the indicator off, turn the
power switch off.
2 After 60 minutes or more elapse,
turn the power switch to ON.
Front seat concentrated
airflow mode (S-FLOW)

3555-1. Using the air conditioning system and defogger
5
Interior features
The air conditioning system can
be switched between the indi-
vidual and synchronous modes.
The mode switches each time
the “SYNC” switch is operated
on the air conditioning operation
panel or the “SYNC” is selected
on the control screen.
Vehicles with “3-ZONE” mode
 In the individual mode, the
temperature for the driver,
front passenger, and rear
seats can be adjusted sepa-
rately.
 In the synchronous mode, the
driver’s side temperature con-
trol switch can be used to
adjust the temperature for the
driver, front passenger, and
rear seats.
• To adjust the temperature for the
front passenger seat separately
from other seats: operate the
front passenger’s side tempera-
ture control switch. (The “SYNC”
of “PASSSYNC” display disap-
pears)
• To adjust the temperature for the rear seats separately from the
front seats: when the synchro-
nous mode is on , operate the
“REAR” switch. Then, operate the
driver’s side or front passenger’s
side temperature control switch
upwards to increase the rear
seats temperature and down- wards to decrease the rear seats
temperature. (The “SYNC” of
“REAR SYNC” display on the
front air conditioning operation
panel and “SYNC” display on the
rear air conditioning operation
panel disappear)
Vehicles with “4-ZONE” mode
 In the individual mode, the
temperature for the driver,
front passenger, left-hand
side rear seats, and right-
hand side rear seats can be
adjusted separately by the
corresponding temperature
control switch on the front and
rear air conditioning operation
panels.
 In the synchronous mode, the
driver’s side temperature con-
trol switch can be used to
adjust the temperature for the
driver, front passenger, left-
hand side rear seats, and
right-hand side rear seats.
• To adjust the temperature for the
front passenger s eat separately
from other seats: operate the
front passenger’s side tempera-
ture control switch. (The “SYNC”
of “PASSSYNC” display disap-
pears)
• To adjust the temperature for the rear seats separately from the
front seats: when the synchro-
nous mode is on, operate the
“REAR” switch. Then, operate the
driver’s side temperature control
switch upwards to increase the
rear seats temperature and
downwards to decrease the rear
Switching between the
individual and synchro-
nous modes

3565-1. Using the air conditioning system and defogger
seats temperature. (The “SYNC”
of “REAR SYNC” display on the
front air conditioning operation
panel disappears)
To adjust the temperature for the
right-hand side rear seats sepa-
rately from the left-hand side rear
seats, operate the passenger’s
side temperature control switch.
(The “SYNC” of “RIGHT SYNC”
display on the rear air condition-
ing operation panel disappears)
• To adjust the temperature for the driver’s seat and passenger’s
seat separately from the rear
seats: when the synchronous
mode is on, operate the passen-
ger’s side temperature control
switch to adjust t he front passen-
ger’s seat temperature. Then
operate the “REAR” switch, and
operate the driver’s side tempera-
ture control switch to adjust the
rear seats temperature. (The
“SYNC” of “REAR SYNC” display
and the “SYNC” of “PASSSYNC”
display on the front air condition-
ing operation panel disappear)
To adjust the temp erature for the
driver’s seat, operate the “REAR”
switch again and operate driver’s
side temperature switch.
Operate the “REAR” switch.
The modes between the rear air
conditioning system and the front
air conditioning system switches
each time the “REAR” switch is
operated.
The air conditioning system switches between
individual and
synchronous modes each time the
“SYNC” switch is operated.
(  P.355)
If the system is left untouched for
approximately 6 seconds after
changing to the rear air condition-
ing system, the control mode in the
front control pane l returns to the
front.
 Adjusting the temperature
setting
Vehicles with “3-ZONE” mode
Operate the driver’s or passen-
ger’s side temperature control
switch upwards to increase the
temperature and operate the
switch downwards to decrease
the temperature.
Vehicles with “4-ZONE” mode
Operate the passenger’s side
temperature control switch to
adjust the right-hand rear seats
temperature, and operate the
driver’s side temperature control
switch to adjust the left-hand
side rear seats temperature.
Operate the temperature con-
trol switch upwards to increase
the temperature and operate the
switch downwards to decrease
the temperature.
 Fan speed setting
Operate the fan speed control
switch upwards to i ncrease the fan
speed and downwards to decrease
the fan speed.
Touch the “OFF” swit ch to turn the
fan off.
Changing the rear seat
settings (if equipped)

3575-1. Using the air conditioning system and defogger
5
Interior features
Change the airflow mode
Operate the airflow mode control
switch.
The airflow mode changes each
time the switch is operated.
( P.359)
 Using automatic mode
Press the “AUTO” switch. ( P.359)
■Location of air outlets
The air outlets and air volume
change according to the
selected air flow mode.
■Adjusting the air flow direc-
tion and opening/closing
the air outlets
Front center outlets
Direct air flow to the left or right, up or down
Front side outlets
1 Direct air flow to the left or
right, up or down
2 Open the vent
3 Close the vent
Air outlet layout and oper-
ations
WARNING
■To not interrupt the wind-
shield defogger from operat-
ing
Do not place anything on the
instrument panel which may cover
the air outlets. Otherwise, air flow
may be obstructed, preventing the
windshield defoggers from defog-
ging.

3585-1. Using the air conditioning system and defogger
“AUTO” switch (automatic mode)
“OFF” switch
Left-hand side temperature control switch
Right-hand side temperature control switch (if equipped)
Fan speed control switch
Airflow mode control switch
■Adjusting the temperature
setting
Vehicles with “3-ZONE” mode
In the individual mode, operate
the temperature control switch
upwards to increase the rear
seats temperature and down-
wards to decrease the rear
seats temperature.
To change to the synchronous
mode from the individual mode,
press the “OFF” switch and then
press the “AUTO” switch.
Vehicles with “4-ZONE” mode
To adjust the temperature for
the left-hand side rear seats and
right-hand side rear seats
together, operate the rear left-
hand side temperature control
switch upwards to increase the
temperature and downwards to
decrease the temperature.
To adjust the temperature for
the right-hand side rear seats
separately from the left-hand
side rear seats, operate the
right-hand side temperature
control switch. Then, operate
Rear automatic ai r conditioning system
Air outlets and fan speed are automatically adjusted accord-
ing to the temperature setting.
Air conditioning controls
A
B
C
D
E
F